Inspection Procedure

CHECK SEAT ILLUMINATION (OPERATION)
HINT:

The personal lights and interior lights share the same power source. Therefore, if none of them come on, inspect the power source circuit first.
1. Push the switches for the personal lights.
2. Check that the personal lights come on.
  OK:
  
  Personal lights come on.
NG: Go to step 7

OK: Go to Next Step

PERFORM ACTIVE TEST BY TECHSTREAM

Connect the Techstream to the DLC3.
Turn the engine switch on (IG).
Turn the Techstream on.
Enter the following menus: Body Electrical / Body No. 3 / Active Test.

Check the operation.

Body No. 3 (Main Body ECU LH)

DIAGNOSTIC NOTE

Tester Display	Test Part	Control Range	Diagnostic Note
Interior Light Operation	Interior lights	ON / OFF	-

OK:

The front and rear interior lights come on.

Result

RESULT CHART

Result	Proceed to
Front interior light does not come on	A
Rear interior light does not come on	B
Neither front nor rear interior light comes on	C
OK	D

A: REPLACE MAIN BODY ECU LH (COWL SIDE J/B LH)

B: Go to step 3

C: Go to step 5

D: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

INSPECT REAR DOME LIGHT ASSEMBLY (REAR INTERIOR LIGHT)
1. Remove the rear dome light assembly.
2. Connect the (+) lead from the battery to terminal 2 and the (-) lead to terminal 4, and then check that the interior light comes on.
  OK:
  
  The interior light comes on.
  
  Fig 1: Identifying R8 Rear Dome Light Assembly Connector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPLACE REAR DOME LIGHT ASSEMBLY

OK: Go to Next Step

CHECK HARNESS AND CONNECTOR (OVERHEAD J/B - REAR DOME LIGHT ASSEMBLY)

Disconnect the R8 rear dome light assembly connector.
Disconnect the R5 overhead J/B connector.

Measure the resistance according to the value (s) in the table below.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
R8-2 (ILLB) - RS-4 (ILLB)	Always	Below 1 Ω
R8-4 (RILL) - R5-33 (RILL)	Always	Below 1 Ω
R8-2 (ILLB) - Body ground	Always	10 kΩ or higher
R8-4 (RILL) - Body ground	Always	10 kΩ or higher

Fig 2: Identifying Harness And Connector (Overhead J/B - Rear Dome Light Assembly)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE MAIN BODY ECU LH (COWL SIDE J/B LH)

CHECK HARNESS AND CONNECTOR (MAIN BODY ECU LH - OVERHEAD J/B)

Disconnect the Q1 main body ECU LH connector.

Measure the voltage according to the value (s) in the table below.

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
Q1-2 (ILE) - Body ground	Always	10 to 14 V

Fig 3: Identifying Q1 Main Body ECU LH Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: Go to step 6

OK: REPLACE MAIN BODY ECU LH (COWL SIDE J/B LH)

CHECK HARNESS AND CONNECTOR (MAIN BODY ECU LH - OVERHEAD J/B)

Disconnect the Q1 main body ECU LH connector.
Disconnect the R5 overhead J/B connector.

Measure the resistance according to the value (s) in the table below.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
Q1-2 (ILE) - R5-13 (ILL)	Always	Below 1 Ω
Q1-2 (ILE) -Body ground	Always	10 kΩ or higher

Fig 4: Identifying Harness And Connector (Main Body ECU LH - Overhead J/B)

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE MAIN BODY ECU LH (COWL SIDE J/B LH)

CHECK HARNESS AND CONNECTOR (POWER SOURCE)

Disconnect the R5 overhead J/B connector.

Measure the voltage according to the value (s) in the table below.

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
R5-1 (+B1) - Body ground	Always	10 to 14 V

Fig 5: Identifying R5 Overhead J/B Connector

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE MAIN BODY ECU LH (COWL SIDE J/B LH)